Momwe Maantibayotiki Amagwirira Ntchito: Kumvetsetsa Nkhondo Ya Tizilombo Toyambitsa Matenda a Anthu
Mankhwala opha tizilombo ndi mankhwala omwe amagwiritsidwa ntchito kupha kapena kuletsa kukula kwa mabakiteriya omwe amayambitsa matenda mwa anthu ndi nyama. Ngakhale kuti mankhwala opha tizilombo ndi zida zamphamvu mu zamankhwala amakono, ndikofunikira kumvetsetsa momwe amagwirira ntchito komanso zovuta zomwe zimagwiritsidwa ntchito. Nkhaniyi ikufuna kufotokoza njira zomwe zimayambitsa maantibayotiki, mitundu yosiyanasiyana ya maantibayotiki, komanso nkhani yofunika kwambiri yotsutsana ndi maantibayotiki.
Chiyambi cha Mankhwala Opha Ululu
Maantibayotiki anayamba kupezeka ndi Alexander Fleming mu 1928 pamene anapeza kuti nkhungu ya Penicillium notatum imatulutsa mankhwala omwe amatha kupha mabakiteriya a Staphylococcus aureus. Kupeza kumeneku kunatsegula njira yopangira mitundu yosiyanasiyana ya maantibayotiki omwe apulumutsa miyoyo ya anthu mamiliyoni ambiri kuyambira pamene anayambitsidwa.
Kawirikawiri, maantibayotiki amagawidwa m'magulu awiri kutengera mtundu wa ntchito yawo: narrow-spectrum ndi broad-spectrum. Maantibayotiki a narrow-spectrum amagwira ntchito polimbana ndi mitundu ina ya mabakiteriya, pomwe maantibayotiki a broad-spectrum amatha kulimbana ndi mabakiteriya osiyanasiyana.
Njira Yogwirira Ntchito Mankhwala Opha Ululu
Njira zogwirira ntchito za maantibayotiki zingagawidwe m'magulu akuluakulu angapo kutengera zolinga zawo ndi momwe amachitira pa mabakiteriya:
1. Zimasokoneza Kupanga kwa Makoma a Ma Cell a Bakiteriya
Khoma la maselo a bakiteriya ndi lofunika kwambiri lomwe limapereka mawonekedwe ndi mphamvu ya makina kwa mabakiteriya. Maantibayotiki monga penicillin amagwira ntchito posokoneza kapangidwe ka khoma la maselo awa.
Penicillin imaletsa enzyme yotchedwa transpeptidase, yomwe imagwira ntchito popanga ma cross-links mu peptidoglycan, gawo lalikulu la makoma a maselo a bakiteriya. Pamene kapangidwe ka makoma a maselo kasokonekera, mabakiteriya sangapulumuke matenda a osmotic ndipo pamapeto pake amafa.
Kupatula penicillin, palinso maantibayotiki ena omwe ali ndi njira zofanana, monga cephalosporins ndi carbapenems.
2. Zimasokoneza Kupanga kwa Mapuloteni
Mabakiteriya amafuna mapuloteni kuti agwire ntchito zosiyanasiyana zofunika, kuyambira kuchulukitsa kwa DNA mpaka kagayidwe kachakudya. Mtundu uwu wa mankhwala opha tizilombo umagwira ntchito polumikizana ndi ma ribosome a bakiteriya, makina omwe amachititsa kuti mapuloteni apangidwe.
Ma ribosome a bakiteriya ali ndi ma subunit awiri: 30S ndi 50S. Maantibayotiki monga tetracycline amamangirira ku subunit ya 30S ndikuletsa aminoacyl-tRNA kuti isamamatire ku ribosome, motero amaletsa kupanga mapuloteni. Pakadali pano, maantibayotiki monga erythromycin ndi chloramphenicol amamangirira ku subunit ya 50S ndikuletsa transpeptidation, kapena translocation, mu kupanga mapuloteni.
3. Zimasokoneza kapangidwe ka Nucleic Acid
Maantibayotiki ena amagwira ntchito poletsa kubwerezabwereza kwa DNA ya bakiteriya kapena kulemba. Ma fluoroquinolones, monga ciprofloxacin, amaletsa ma enzyme a DNA gyrase ndi topoisomerase IV, omwe amathandiza kuti DNA ipangike kwambiri, zomwe ndizofunikira kwambiri pakubwerezabwereza kwa DNA. Ntchito zimenezi zikalepheretsedwa, mabakiteriya sangabwerezenso DNA yawo kenako n’kufa.
Mankhwala ena opha tizilombo toyambitsa matenda, monga rifampicin, amaletsa RNA polymerase, enzyme yomwe imapangitsa kuti DNA isinthe kukhala RNA. Izi zimasokoneza kapangidwe ka RNA ndipo, motero, zimalepheretsa kukonza mapuloteni bwino.
4. Kusokoneza Ntchito ya Ma cell a Bacteria
Kudalira kwa mabakiteriya pa nembanemba ya selo ngati chotchinga pakati pa malo akunja ndi amkati kumatsegula njira yopangira maantibayotiki omwe amalimbana ndi kapangidwe kameneka. Polymyxin B ndi chitsanzo; maantibayotiki awa amamangirira ku lipopolysaccharides mu nembanemba yakunja ya mabakiteriya a Gram-negative ndipo amachititsa kuti nembanemba ilowe, pamapeto pake kupha mabakiteriya.
5. Amaletsa Kagayidwe ka Mabakiteriya Ofunika
Maantibayotiki ena amalimbana ndi njira zofunika kwambiri zochizira matenda a bakiteriya. Mwachitsanzo, ma sulfonamides amaletsa kupanga folic acid, yomwe ndi yofunika kwambiri popanga nucleotide ndi amino acid. Popanda folic acid, mabakiteriya sangapulumuke.
Maantibayotiki ndi Kukana
Pamodzi ndi kugwiritsidwa ntchito kwa maantibayotiki ambiri, vuto lalikulu labuka: kukana maantibayotiki. Mabakiteriya ali ndi mphamvu yosinthira kupanga njira zokana maantibayotiki kudzera munjira zosiyanasiyana, monga:
– Kusintha kwa majini: Kusintha kwa DNA komwe kumasintha cholinga cha mankhwala opha tizilombo toyambitsa matenda mkati mwa mabakiteriya. Mwachitsanzo, kusintha kwa majini komwe kumasintha kapangidwe ka malo omangira pa ribosome kumalepheretsa mankhwala opha tizilombo kuti asamamangire.
– Kusamutsa Majini Molunjika: Mabakiteriya amatha kupeza majini okana kuchokera ku mabakiteriya ena kudzera mu kusintha, kusintha, kapena kuphatikizika. Majini okana nthawi zambiri amapezeka pa ma plasmid, omwe amatha kusamutsidwa pakati pa mabakiteriya.
– Kusintha kwa Kutha kwa Ma Nembrane: Mabakiteriya amatha kuchepetsa kutha kwa ma nembrane awo kupita ku maantibayotiki kapena kupanga mapampu otulutsa madzi omwe amapopera maantibayotiki kuchokera mu selo.
Kupanga kusamva mankhwala opha tizilombo kumafuna njira yogwirizana kuyambira pa mfundo zanzeru zogwiritsira ntchito mankhwala opha tizilombo, kupanga mankhwala atsopano opha tizilombo, mpaka kuphunzitsa anthu onse za kugwiritsa ntchito mankhwala opha tizilombo.
Mapeto
Mankhwala opha tizilombo toyambitsa matenda ndi zida zofunika kwambiri pa zamankhwala zomwe zasintha momwe timachiritsira matenda a bakiteriya. Amagwira ntchito m'njira zosiyanasiyana, kuyambira kusokoneza kapangidwe ka makoma a maselo a bakiteriya mpaka kuletsa kapangidwe ka mapuloteni. Komabe, chifukwa cha kukana mankhwala opha tizilombo toyambitsa matenda, mavuto omwe tikukumana nawo akuchulukirachulukira. Kudziwa bwino momwe mankhwala opha tizilombo amagwirira ntchito komanso njira zopewera kukana mankhwala ndikofunikira kwambiri kuti apitirizebe kugwira ntchito polimbana ndi matenda a bakiteriya mtsogolo. Kugwiritsa ntchito mankhwala opha tizilombo mwanzeru komanso kutsatira upangiri wachipatala ndi njira zofunika kwambiri zomwe munthu aliyense angachite kuti ateteze thanzi la padziko lonse lapansi.
